package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * @author Encounter
 * @date 2024/09/06 21:25<br/>
 * 分类业务层
 */
@Service
@Slf4j
public class CategoryServiceImpl implements CategoryService
    {
        
        @Autowired
        private CategoryMapper categoryMapper;
        @Autowired
        private DishMapper dishMapper;
        @Autowired
        private SetmealMapper setmealMapper;
        
        
        /**
         * 新增分类
         *
         * @param categoryDTO 类别 DTO
         */
        public void save(CategoryDTO categoryDTO)
            {
                Category category = new Category();
                //属性拷贝
                BeanUtils.copyProperties(categoryDTO, category);
                
                //分类状态默认为禁用状态0
                category.setStatus(StatusConstant.DISABLE);
                
                //设置创建时间、修改时间、创建人、修改人
                /*category.setCreateTime(LocalDateTime.now());
                category.setUpdateTime(LocalDateTime.now());
                category.setCreateUser(BaseContext.getCurrentId());
                category.setUpdateUser(BaseContext.getCurrentId());*/
                
                categoryMapper.insert(category);
            }
        
        
        /**
         * 分页查询
         *
         * @param categoryPageQueryDTO 分类页查询 DTO
         * @return {@link PageResult }
         */
        public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO)
            {
                PageHelper.startPage(categoryPageQueryDTO.getPage(), categoryPageQueryDTO.getPageSize());
                //下一条sql进行分页，自动加入limit关键字分页
                Page<Category> page = categoryMapper.pageQuery(categoryPageQueryDTO);
                return new PageResult(page.getTotal(), page.getResult());
            }
        
        /**
         * 根据id删除分类
         *
         * @param id 身份证
         */
        public void deleteById(Long id)
            {
                //查询当前分类是否关联了菜品，如果关联了就抛出业务异常
                Integer count = dishMapper.countByCategoryId(id);
                if (count > 0)
                    {
                        //当前分类下有菜品，不能删除
                        throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
                    }
                
                //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
                count = setmealMapper.countByCategoryId(id);
                if (count > 0)
                    {
                        //当前分类下有菜品，不能删除
                        throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
                    }
                
                //删除分类数据
                categoryMapper.deleteById(id);
            }
        
        /**
         * 修改分类
         *
         * @param categoryDTO 类别 DTO
         */
        public void update(CategoryDTO categoryDTO)
            {
                Category category = new Category();
                BeanUtils.copyProperties(categoryDTO, category);
                
                //设置修改时间、修改人
                /*category.setUpdateTime(LocalDateTime.now());
                category.setUpdateUser(BaseContext.getCurrentId());*/
                
                categoryMapper.update(category);
            }
        
        /**
         * 启用、禁用分类
         *
         * @param status 状态
         * @param id     菜品ID
         */
        public void startOrStop(Integer status, Long id)
            {
                Category category = Category.builder()
                        .id(id)
                        .status(status)
                        /*.updateTime(LocalDateTime.now())
                        .updateUser(BaseContext.getCurrentId())*/
                        .build();
                categoryMapper.update(category);
            }
        
        /**
         * 根据类型查询分类
         *
         * @param type 类型
         * @return {@link List }<{@link Category }>
         */
        public List<Category> list(Integer type)
            {
                return categoryMapper.list(type);
            }
    }

